#include <iostream>
using namespace std;
int main(){
    int a=10;
    int * p=&a;
    cout<<&a<<endl;
    cout<<p<<endl;
    cout<<a<<endl;
    cout<<*p<<endl;
    cout<<sizeof(a)<<endl;
    cout<<sizeof(*p)<<endl;
    cout<<sizeof(int *)<<endl;
    cout<<sizeof(float *)<<endl;
    cout<<sizeof(double *)<<endl;
    cout<<sizeof(char *)<<endl;
    return 0;
}
